Switching between write journaling modes for a high-availability storage system configuration for failover scenarios

Abstract

Systems and methods for performing journal swapping are provided. In one example, the backing storage used for virtual non-volatile random access memory (vNVRAM) is dynamically switched based on the high-availability (HA) state of an HA pair of nodes of a virtual storage system. By default, in-memory logging may be used for write journaling when the HA pair is operating in a normal HA state. When the HA pair is in an HA degraded state, the write journaling may be performed to local ephemeral storage. This allows the file system of the virtual storage system to run in a more performant configuration most of the time (e.g., during which HA is enabled and healthy). At the same time, the file system has the ability to swap to a less performant but more resilient configuration during planned events (e.g., scheduled maintenance and throughput scaling) in which HA is in a degraded state.

Dependencies are inferred from the claim text.